I have solution where the users are in a virtual Microsoft Server 2012 R2 environment there out of the blue over a night for one user fonts just disappear. In FileMaker this makes very strange behaviour for Button Bars with a Popover only. For all the rest of the users the Popover works great.
I had this problem a few years back and from what I remember then I had to recreate the users virtual desktop to get it to work again. The only software that have this problem is FileMaker Pro. They use Office and other software in same virtual environment without this problem. Anyone that got an idea why this happens and what I can do to prevent this from happening again?